1 files changed, 108 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/java-M1-final/java/sca/core/src/main/java/org/apache/tuscany/core/async/invocation/AsyncInterceptor.java b/sca-java-1.x/tags/java-M1-final/java/sca/core/src/main/java/org/apache/tuscany/core/async/invocation/AsyncInterceptor.java
new file mode 100644
index 0000000000..08a718bd73
--- /dev/null
+++ b/sca-java-1.x/tags/java-M1-final/java/sca/core/src/main/java/org/apache/tuscany/core/async/invocation/AsyncInterceptor.java
@@ -0,0 +1,108 @@
+/**
+ *
+ *  Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.apache.tuscany.core.async.invocation;
+
+import javax.resource.spi.work.Work;
+import javax.resource.spi.work.WorkException;
+import javax.resource.spi.work.WorkManager;
+
+import org.apache.tuscany.core.message.Message;
+import org.apache.tuscany.core.message.MessageFactory;
+import org.apache.tuscany.core.wire.Interceptor;
+import org.osoa.sca.CurrentModuleContext;
+import org.osoa.sca.ModuleContext;
+import org.osoa.sca.SCA;
+import org.osoa.sca.ServiceRuntimeException;
+
+/**
+ * A wire interceptor that uses a WorkManager to schedule asynchronous execution of invocations in Work instances.
+ */
+public class AsyncInterceptor implements Interceptor {
+    
+    private static final ContextBinder BINDER = new ContextBinder();
+    
+    private WorkManager workManager;
+    private MessageFactory messageFactory;
+    private Interceptor next;
+
+    /**
+     * Constructs a new instance
+     * @param workManager
+     */
+    public AsyncInterceptor(WorkManager workManager, MessageFactory messageFactory) {
+        this.workManager=workManager;
+        this.messageFactory=messageFactory;
+    }
+    
+    public Message invoke(final Message message) {
+
+        final ModuleContext currentModuleContext=CurrentModuleContext.getContext();
+        
+        // Schedule the invocation of the next interceptor in a new Work instance
+        try {
+            workManager.scheduleWork(new Work() {
+                
+                public void run() {
+                    ModuleContext oldModuleContext=CurrentModuleContext.getContext();
+                    try {
+                        BINDER.setContext(currentModuleContext);
+                        
+                        // Invoke the next interceptor
+                        next.invoke(message);
+                        
+                    } catch (Exception e) {
+                        //FIXME How do we report exceptions?
+                        e.printStackTrace();
+
+                    } finally {
+                        
+                        BINDER.setContext(oldModuleContext);
+                    }
+                }
+                
+                public void release() {
+                }
+                
+            });
+        } catch (WorkException e) {
+            //FIXME Which exception should we throw here? 
+            throw new ServiceRuntimeException(e);
+        }
+        
+        // No return on a OneWay invocation.
+        return messageFactory.createMessage();
+    }
+
+    public void setNext(Interceptor next) {
+        this.next=next;
+    }
+
+    private static class ContextBinder extends SCA {
+        public void setContext(ModuleContext context) {
+            setModuleContext(context);
+        }
+
+        public void start() {
+            throw new AssertionError();
+        }
+
+        public void stop() {
+            throw new AssertionError();
+        }
+    }
+    
+}